\section{Objective}

The objective of this project is to design and build a digital altimeter for
use in experimental amateur rocketry. The required specifications are:

\begin{enumerate}
\item Dual deployment system (drogue and main at programmable altitude).
\item Electrical continuity check of ejection charges.
\item Barometric pressure sensor for the detection of the following events:

\begin{enumerate}
\item Lift off.
\item Apogee.
\item Altitude for main recovery system deployment.
\item Landing.
\end{enumerate}

\item Visual and acustic interface to report status and max altitude attained, according to predefined protocol.
\item Serial interface for external communication.

\end{enumerate}